Micro-Turbine Systems for Energy Production from Agricultural and Food Waste

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2 Micro-Turbine Systems for Energy Production from Agricultural and Food Waste

3 Unison Solutions Overview Turnkey waste-to-energy systems Biogas compression/treatment system design and fabrication (Siloxane, moisture and H2S removal) Gas conditioning system components (suction scrubbers, heat exchangers, filtration, condensate knock-outs, etc.) New line of Air and Gas drying equipment Capstone MicroTurbine ASP and distributor (thru Alliant Energy) STM Power Stirling Engine Generator Distributor Multiple awards for Biogas systems (EPA project of the year 2003)

4 A Sampling of Unison Solutions Biogas Landfills Projects 1. Antioch IL-12 Turbine CHP 2. Sauk Co. WI-16 Turbines 3. Glacier Ridge WI-10 Turbines 4. Wisc. Rapids WI-2000 scfm boiler direct use 5. Madison WI-1 STM Stirling Engine WWTF/Industrial/Farm Digesters 1. Rockford IL-2.25 MW Engine CHP 2. Chippewa Falls WI-2 Turbine CHP 3. Albert Lea MN-4 Turbine CHP 4. Sheboygan WI-10 Turbine CHP 5. Northern Star Co. MN-4 Turbines 6. Top Deck Farms IA-4 Turbines

5 2000scfm Gas Treatment System

6 India Dairy Operation

7 2000scfm Gas Treatment System

8 India Gas Treatment System

9 Northern Star Foods Minneapolis, MN 4-30kW Capstone Turbine System

10 Key Components of the Installation Mesophilic Anaerobic Digester Gas conditioning equipment (Moisture Removal) Gas compression system-scroll compressors Generation System-4 30kW Capstone turbines No Heat recovery system Electrical System Interconnection Communications/Automation Utility metering

11 Gas Compression/Treatment Skid

12 Scroll Compressors

13 4-Capstone 30kW Micro-Turbines

14 Generator Cooling Fins Exhaust Outlet System Block Diagram Recuperator Combustion Chamber Fuel Air Exhaust DPC Fuel System Gas Turbine Generator Power Board Electrical Output Turbogenerator Control Board Communications and Control User Interface Air Bearings Generator Compressor Turbine

15 System Block Diagram Fuel Air Exhaust Fuel System Turbogenerator Digital Power Controller (DPC) Electrical Output Turbogenerator Communications and Control User Interface

16 Northern Star Project Overview Approx. 2 years of operation since gas conditioning skid replacement. Biogas compression/treatment system is removing the moisture from the gas and protecting the turbines Parasitic load on system for biogas compression and treatment is 15% Biggest challenge has been the high levels of H2S

17 Top Deck Farms Westgate, Iowa 4-30kW Capstone Turbine System

18 Key Components of the Installation Traditional plug-flow digester-750 head dairy Gas conditioning equipment (Moisture Removal) Gas compression system-flooded screw Generation System-4 30kW Capstone turbines Heat recovery system-cain heat exchanger Methane/LP fueled boiler Electrical System Interconnection Communications/Automation Utility metering

19 Complete Gas Conditioning System

20 Suction Scrubber

21 Flooded Screw Gas Compressor

22 Glycol Chiller for Moisture Removal

23 Capstone 30 kw Micro-Turbines

24 Exhaust Heat Exchanger

25 Methane/LP Boiler

26 Controls for all System Functions

27 Top Deck Project Overview Approx. 1 year of operation since IC engine/generator removed Biogas compression/treatment system is removing the moisture from the gas and protecting the turbines Parasitic load on system for biogas compression and treatment is 16% Installation cost of $3,000/kW O&M cost is running $0.01/kWh or $9900/year Biggest challenge has been the dual fuel gas train on the boiler

28 Key Issues with Micro-Turbines on Ag or Food Waste Digestion Ag/Food Waste digester fueled micro-turbine systems need gas conditioning for moisture removal. Micro-turbine systems also need gas compression to 80psi. Large quantity of thermal energy is available for heating the digester, domestic hot water and space heating with a proper heat recovery system. Turbine and gas treatment O&M expense is minimal if the system is designed and built properly. Micro-turbines are a viable option for Ag/Food Waste digester fueled combined heat and power systems

29 Unison Solutions Contact Information Jan Scott